Table 2.

Cox regression analysis for various potential prognostic factors in overall survival

Variable	Unfavorable/favorable characteristics	No. of patients	Univariate (U)			Multivariate (M)
			Relative risk	95% confidential interval	P value	Relative risk	95% confidential interval	P value
Grade	4,3/2,1	48/12	6.33	1.45–26.82	0.0122	11.05	1.98–61.84	0.0062
pT	4,3/2,1	54/6	2.49	0.59–10.56	0.2131	1.05	0.21–5.25	0.9510
pN	2,1/0	21/39	3.00	1.45–6.21	0.0030	1.52	0.67–3.47	0.3208
PD-L1	low/high	32/28	0.56	0.26–1.18	0.1268	0.78	0.28–2.18	0.6422
CD39	high/low	37/23	1.16	0.54–2.49	0.6939	0.86	0.37–1.98	0.7164
CD73	high/low	16/44	2.08	0.96–4.50	0.0629	2.98	0.81–5.47	0.1297
A2AR	high/low	25/35	3.98	1.88–8.41	0.0003	6.89	2.28–20.89	0.0006
Histology	non-ccRCC/ccRCC	10/50	1.39	0.57–3.39	0.4742	1.01	0.34–2.91	0.9908